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PURPOSE To evaluate, qualitatively and quantitatively, the role of surgical clips in planning the tumor bed electron or brachytherapy boost in patients undergoing breast-conserving surgery and radiotherapy. PATIENTS AND METHODS In 60 patients with breast cancer stage I or II, the excision cavity boundaries were marked by clips at surgery. Patients(More)
BACKGROUND & OBJECTIVE Determination of planning risk volumes (PRVs) for an organ at risk greatly affects dose optimization in designing the intensity-modulated radiation therapy (IMRT) regimen. Patient setup errors have been found to closely correlate to the definition of PRVs. This study was to investigate the safety margin for the organ at risk during(More)
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